code p0430 repair

[mclark]

What to look for to fix this code p0430, car runs fine, no loss of power or performance it seems to run better, gas mileage is good . I can clear the code and CE light stays off for about 200 plus miles then comes back on . Changed down stream o2 sensor with no fix, is it time for catalytic replacement, any ideas. 2010 w/109000 miles.

 

[rubydist]

Since the code is only complaining about the effectiveness of the cat, the engine should run normally and have no loss of power.

If there is an oxy sensor problem in this scenario, it is far more likely to be the front sensor not switching at the proper point.

Are there any other codes being set? If not, I would replace the front oxy sensor on that bank.

 

[toms89]

That is the downstream sensor (after the cat) on bank 2 (Front bank) just to confirm. The gen 4 Taurus sho use wideband sensor upstream so have doubts that would be the issue. Unless you get code for it of course.

 

[kryptto]

Take a peak, have you used octane boosters fuel additives can clog the cat. Even if the vendors report on the product differently.

You can try this - might be a cheap way to see if error goes away - If the error goes away then comes back - replace cats

Sent from my SM-T860 using Tapatalk

 

[Ta2dResqr]

What to look for to fix this code p0430, car runs fine, no loss of power or performance it seems to run better, gas mileage is good . I can clear the code and CE light stays off for about 200 plus miles then comes back on . Changed down stream o2 sensor with no fix, is it time for catalytic replacement, any ideas. 2010 w/109000 miles.

Did you change 1 sensor or both? Stock cats?

 

[mclark]

Just one ,down stream was changed, with factory cats

 

[mclark]

No other codes only p0430, I've had it cleared three times and the same one code returns,

 

[FREAK_SHO]

bad cat if you've replaced all upstream o2 sensors

https://www.carparts.com/blog/p0430-code-catalyst-system-efficiency-below-threshold-bank-2/

 

[Ta2dResqr]

Just one ,down stream was changed, with factory cats

Are you sure the correct downstream was changed? There is 1 for each bank.

 

[webbrook]

What to look for to fix this code p0430, car runs fine, no loss of power or performance it seems to run better, gas mileage is good . I can clear the code and CE light stays off for about 200 plus miles then comes back on . Changed down stream o2 sensor with no fix, is it time for catalytic replacement, any ideas. 2010 w/109000 miles.

there are utube vidoes about using spark plug non foulers to space out the o2 sensor, it works as i have done this

 

[webbrook]

there are utube videos about using spark plug non foulers to space out the o2 sensor, it works as i have done this.

 

[mclark]

Down stream on bank 2 radiator side, should all upstream o2 be changed,